Typewriting machine



April 9, 1940.

w A. nosscN 2,196,790

TYPEWRITING. MACHINE I Filed Nov. 22, 1955 8 Sheefs-Sheet 1 ATTORN EApril 9, 1940.

w. A. DOB SON TYPEWRITING MACHINE Filed Nov. 22,. 1935 8 Sheets-Sheet 2ii n...

QATTQRN April 9, 1940; w, DQBSQN 2,196,790

TYPEWRITING MACHINE Filed Nov. 22,1955 8 Sheets-Sheet s INVENTOR wx/ATTORN April 1940- w. A. DOBS'ON 2,196,790

TYPEWRITING MACHINE Filed Nofi- 22, 1955 a Sheets-Sheet 4 Fl id. w

iNvENToR I ATTORNEY 9, 1940. w, DQBSQN 1 2,196,790

' "TYPEWRITING MACHINE Filed Nov. '22, 1935 INVENTOR I ATTORNEY;

p 9, 1940- w. A. DOBSQN 2,196,790

TYPEWRITING MACHINE Filed Nov. 22 1935 I 8 She eis-Sheet 6 Ap 1940- w.A. bo soN 2,196,790

TYPEWRITING MACHINE Filed Nov. 22,. 1935 8 Sheets-Sheet 7 INVENTOR AWQRNE? p 1940- w. A. DIOBSON 2,196,790

TYPEWRITING MACHINE Filed Nov. 22, 1935 8 Sheets-Sheet B INVENTQR wa m 'By I; 1

ATTORNEY Patented Apr. 9, 1940 UNITED STATES PATENT orrlcs 2,196,790-TYPEWRI-TING MACHINE William A. Dobson, Wethersfield, Conn., assignorto Underwood Elliott Fisher Company, New York, N. Y., a corporation ofDelaware Application November 22, 1935, Serial No. 51,097 25 Claims.(Cl. 19763) This invention relates to a combined margin and tabulatormechanism, and is shown .em-

bodied in an Underwood portable typewriting machine.

Stops of novel construction are employed for both margin controlling andtabulating.

The novel stop, when in one position, engages a margin counter-stopwhich may be provided at the center of the machine to limit the movementof the carriage in both directions, thus controlling the writingline-length.

Upon being displaced to another position, the novel combination stopengages a tabulator counter-stop. The use of the novel stop is thusalternative.

There is effected a substantial reduction in the number of parts and asaving in weight and cost over the application of separate margin andtabulator stop mechanism, especially to portable machine.

It is thus possible to obtain the advantages of both ordinarymargin-regulating and columnar or tabulator work.

A conventional braking mechanism can be applied to the carriage of themachine to further reduce the strains on the light machine-framework.

discretion of the operator.

A rack pivotally mounted on the ends of the stop-shaft laterallyletter-spaces the stops, and may also be utilized as a control guide inrestoring the stops to their inoperative positions.

A margin-stop-set key and a tabulator-stopset key may set in motion anovel mechanism for rotating the selected combined stops to their marginor tabulating positions. The stops preferably engage a pair of marginalcounter-stops, limiting the carriage movement in both directions.

A tabulator counter-stop may also be incorporated to engage thecombination stops in their tabulating control position, when a tabulatorkey on the keyboard is depressed by the operator.

The mechanism will rotate the stops to either the margin or tabulatingposition, regardless of whether the carriage is in its normal oruppercase position.

Alternative types of novel combination stops are disclosed to accomplishthis purpose.

Ina

preferred construction, the stops are pivoted on a cylindrical shaftmounted on the carriage of the machine. Depressing a margin-stop-set keyprovided on the keyboard of the machine, actuates a system of levers andcontrol arms, which rotate the selected pivoted combination stop aboutthe shaft until a portion of the bottom of the combination stop is inthe range of one of a pair of margin counter-stops preferably attachedto a lever mounted on the frame of the machine.

At the start of the writing line, one of the combination stops on theleft side of the machine, angularly displaced into its margin-controlposition, as previously described, engages the right margincounter-stop, arresting the movement of the carriage and determining theleft margin position of thewriting line on the worksheet. The leftcombination stop in its margincontrol position is so constructed as toby-pass the left counter-stop during the rightward movement of thecarriage. When the carriage is letter-fed to the finish of a writingline, one of the right combination stops, rotated to its margin-controlposition by depressing the marginstop-set lever, as previouslydescribed, engages the left counter-stop, which is preferably eitherforwardly or rearwardly displaced from the right counter-stop, thusarresting the letter-feeding movement of the carriage and determiningthe finish of the writing line. At the end of the writing line the keysare locked in a known manner, the margin counter-stop lever cooperatingin actuating the key-locking device. During the letter-feeding movementof the carriage, the right combination stop in its margin-controlposition is preferably arranged by novel means to by-pass the rightcounter-stop.

By depressing a tabulator-stop-set key attached to a lever, which may beoperatively connected to the margin-stop-set lever, previouslydescribed, the selected combination stop, determined by the position ofthe carriage at thetime, is displaced through a small angle about thestopmounting shaft, so that the bottom of the stop is in the range of atabulator counter-stop. When a tabulator-key on the keyboard isdepressed, the tabulator counter-stop is moved into the path of thecombination stop in its tabulatorcontrol position. The carriage-feedrack may be released in the usual manner, when a tabulatorkey isdepressed, the carriage being rapidly pulled in the letter-feeddirection by a conventional spring-motor, until the selected combinationstop in its tabulator-control position engages the tabulatorcounter-stop, arresting the movement of the carriage to determine atabulating position of a writing line.

A novel stop-rack may be pivotally mounted on the cylindrical shaft, tolaterally space and guide the combination stops in some of their variouspositions. A. series of spring detents may beprovided to retain thestops in their margin or tabulator control positions, said detents beingpreferably mounted on the rear of the stop-rack.

The stop-control levers may be arranged to displace the stops into theiroperative positions, regardless of whether the carriage is in its normalor shifted position, by a novel mechanism consisting of a verticalstop-control lever which may be slidably and pivotally mounted on ashaft, pivotally. mounted on the shift-frame at one end, withtheopposite end pivotally attached to the fixed machine frame, saidlever remaining vertical. When the carriage is shifted the top of thestop-control lever is thus enabled to engage andangularly displace thecombination stopin the same manner as when the carriage is in its normalposition.

A stop-restorer lever or key may also be provided for rotating the stopsinto the range of a novel cam or other type of stop-restoring mechanismto rotate the stops to their inoperative positions, out of range of boththe tabulator and margin counter-stops when the carriage is moved in theletter-feed direction by releasing the carriage-feed rack from theescapement mechanism by known means. The above stoprack may cooperate inthis stop-restoring operation.

In an optional construction, a novel stop-rack, with a series of slotscut vertically, across the center of. the rack, and letter-spaced alongits effective length, and a series of notches, in line with said slots,cut across the top and bottom of the rack, may be fixedly attached tothe carriage. A series of novel combination stops of the sliding oroptional type may be inserted in these slots in the stop-rack, withanovel longitudinal retainer or other suitable device slidably fittedwithin the rack to retain the combination stops in their respectiveslots in the rack and to limit the vertical movement of the stops in onedirection. The stops may be slotted to provide a spring detent at oneside, to frictionally hold the stop within its slot in the rack in someof its operative positions. A shoulder or other suitable means may alsobe provided on the stop to limit its vertical movement in one direction,the aforementioned longitudinal retainer limiting its vertical movementin the opposite direction.

The stop-control keys are similar to those previously described. Whenthe margin-stop-set key is depressed, it actuates a novel stop-controlslide through a system of levers, said slide 'de pressing the selectedcombination stop within a slot in the rack to the margin-controlposition where it may engage the corresponding margin counter-stop atthe center of the frame, to limit the lateral movement of. the carriagein its respective direction and control the length and position of thewriting line as previously described.

The combination stops on the right side of the rack are preferablyslotted to by-pass the right counter-stop while in the margin-controlposition, duringthe letter-feeding movement of the carriage. The stopson the left side of the rack may be cut out or slotted to by-pass theleft counter-stop when the carriage is moved-in the opposite direction.The right margin counterstop may be displaced either forwardly orrearwardly of the left margin counter-stop in order to enable it toengage the selected left combination stop in its margin-control positionwithout interfering with the operationof the right combination stops.

Depressing a tabulator-stop-set key causes the stop-control slide toslide the selected combination stop downwardly in the rack throughapproximately half the distance required for margin-stop operation, intothe tabulator-control position. When the tabulator key on the keyboardis depressed, as previously described, a novel type of tabulatorcounter-stop bracket, pivotally mounted on a shaft attached to theframe, may be rotated into its operative position, with a tabulatorcounter-stop finger, attached to said bracket in the path of thecombination stops in their tabulator-control position, to arrest themovement of the carriage and determine an intermediate or tabulatingposition thereof.

A stop-restoring key on the keyboard is preferably provided to actuate anovel stop-restoring lever which may engage the bottom of the stops ineither their margin or tabulator control positions, and, while thecarriage is rapidly moved in the letter-feed direction as previouslydescribed, raise the stops within the slots in the rack to theirinoperative positions out of range of both the tabulator and margincounter-stops.

Known types of line-end key-lock, line-end key-release and line-endsignal may be utilized,

the combination stops in their margin-control positions and the margincounter-stop lever respectively co-operating in the control thereof. Theconventional type of spring-motor driven carriage, carriage escapement,carriage-feed rack and rack release, as well as carriage-brakingmechanism, may also be incorporated in the machine in the usual manner.

The entire construction of this unique device is light, compact, can beapplied to a portable machine without altering its general construction,and is so simple in its operation that an operator of ordinary skill canutilize it to its full advantage, thus saving time in performingtypewritten work requiring indentations cr columns of various kinds.

A modified type of combination stop may be incorporated, inwhich thestop is slidably fitted in a rack fixed to the carriage-end plates. Aunique mechanism may also be provided for sliding these stops into oneof several operating positions for engagement with either a margin or atabulating counter-stop by depressing the appropriate control key on thekeyboard. A stoprestorer key actuating a series of novel stoprestorerinstrumentalities may also be utilized .to restore the stops to theirnormal or inoperative position, out of range of the margin and tabulatorcounter-stops.

A mechanism for locking the keys at the end of a writing line by thecontact of the selected combination stop in its margin-control positionwith the corresponding margin counter-stop, as well as means forreleasing said keys upon the disengagement of. said stop from saidcounter stop, may also be incorporated, the counter-stopsupporting leverco-operating in the actuation of said mechanism.

The usual line-end signal is preferably given when the carriageapproaches the end of its writing line, the selected combination stop inits margin-control position actuating said lineend signalinstrumentalities. A margin-release mechanism actuated either by amargin-release button at the front of the machine, or a key in thekeyboard, may be incorporated to disengage the selected combination stopin. its margincontrol position by either throwing the margincounter-stop out of engagement with the combination stop, or byutilizing other suitable means, to extend the writing line beyond theestablished margin position.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a rear perspective view of aportable typewriting machine, showing a'preferred type of combinedmarginal and tabulating stops, said stops being pivotally mounted uponthe shaft, and also indicating the margin and tabulator set keys, thestop actuating mechanism, and the counter-stops and the stop-restoringmechanism.

Figure 2 is a partial perspective view of the machine of Figure 1,showing the carriage-escapement-release mechanism.

Figure 3 is a perspective view of a portion of the shift-frame andcarriage of the machine, showing the carriage-brake mechanism.

Figure 4-is a cross-section through the machine of Figure 1, showing themargin and tabulator stop set keys, the margin and tabulator stopactuating mechanism, and the pivoted combination margin and tabulatorstops in their various operative positions, as well as the margin andtabulator counter-stops, in their relative positions with relation tothe platen of the machine.

Figure 5 is a rear elevation of the machine of Figure 1, showing thestop-rack, the stopmounting shaft, with the stops pivotally mountedthereon, also the margin, and tabulator counter-stops, and the line-endsignal mechanism.

Figure 5 is a fragmentary perspective view of the disassembledstop-control levers of Figure 5, showing the method of mounting thelevers on the shaft.

Figure 6 is a rear perspective view of the stop rack of Figure 1,showing the pivoted combination margin and tabulator stops in variousoperating positions, together with the stop-restoring mechanism.

Figure I is a perspective of the escapement universal bar, showing aportion of the line-end key-lock mechanism;

Figure 8 is a cross-section of a portion of the machine of Figure 4,showing the position of the stop-control lever, with the carriageshifted to the upper-case position.

Figure 9 is a detailed cross-section of a portion of the machine,indicating the margin and tabulator'stop set keys in thetabulator-stopsetting position, and showing the pivoted combinationstops, the stop-control mechanism and the tabulator-counter-stop in thetabulating position. t

Figure 10 indicates the mechanism of Figure 9 with the keys and stopsset in the margincontrol position, showing the method of engagement ofthe margin-counter-stops with the pivoted combination stop.

Figure 11 is a partial cross-section of the machine, showing thestop-restoring lever in its operative position with the cam inoperation, re-

storing the pivoted stops to their normal positions.

Figure 12 is a view similar to that of Figure 1, indicating a modifiedtype of combined margin and tabulator stops in their various operativepositions as well as the margin and tabulator stop set keys, and thestop-restoring key, with I their respective actuating mechanisms.

Figure 13 represents a partial plan view of the -machine-frame of Figure12, indicating the method of mounting the stop-control slide.

Figure 14 is a rear elevation of the machine of Figure 12, showing thesliding type of com- ,bined margin and tabulator stops in their variousoperative positions, also the margin and ,tabulator counter-stops, andthe line-end signal mechanism.

Figure 15 is a fragmentary perspective view of the carriage, indicatingthe method of mounting the tabulator-counter-stop for engaging thesliding combination stops in their tabulating position.

Figure 16 is a partial cross-section through the carriage of Figure 14,showing a sliding combination margin and tabulator stop in itstabulating position, and the method of its engagement with thetabulator-counter-stop.

Figure 17 is a partial cross-section through the machine of Figure 12,indicating the sliding 'type of combination stop in its normal orinoperative position, in relation to the margin and tabulatorcounter-stops, as well as the stopcontrol mechanism. V

Figure 18 is a fragmentary elevation of the machine of Figure 12,showing the stop-control mechanism and the sliding type of combinationstop in the'tabulating position.

Figure 19 is a view similar to Figure 18, showing the stop-restoringmechanism in its operative position.

Figure 20 is a perspective view of the rack of the machine of Figure 12,showing the left and right hand combination stops in various positions,together with the margin-counter-stops and the tabulator-counter-stopfor engaging said combination stops.

Figure 21 is a perspective view of the righthand margin-stop of Figure20, indicating the stop-locating detent and the clearance slot forby-passing the right-hand counter-stop.

Figure 22 is a view similar to Figure 21, of the machine by theco-operating pairs of runways.

32, 33, anti-friction elements 34 being interposed between the carriageand frame runways. A revoluble platen 35 is journaled in the carriageendplates 36 and 31.

In a preferred embodiment of this invention, a channel-shaped stop rack38, Figure 6, may be mounted by means of flanges 39 formed at its endson a shaft 40, extending between the carriage-end plates 36 and 31,behind the platen 35, as indicated-in Figures 1 and 6. A pair of screws41, threaded into the ends of the shaft 40, preferably secure the shaftand stop rack to the carriage-end plates. A collar 42 at each end ofshaft is interposed between end plates 35 and 31 and the flanges 39 ofthe stop rack so as to laterally locate said stop rack.

and tabulator stops 43 and 44 may be pivotally mounted on the shaft 40,and slidably fitted into a series of letter-spaced slots 38 out alongthe effective working length of the bottom of the stop rack. Each set ofstops occupies half the length of therun of the carriage. The stops ofthe lefthand set, designated by the number 43, areused for margin gagingwhen returning the carriage to a new line writing position. The righthand stops, designated by the number 44, are for gaging the right-handmargin when the carriage is running in letter-feed direction. Theright-hand stops, also co-operate with end of line signal andkey-locking devices as later described. Both sets of stops are also usedfor tabulating, the position into which a combination stop is setdetermining its use as a margin gaging or tabulating stop.

In order to set the combination stops in the margin-control position, amargin-set key 45 is depressed, a column 48 upon which said key ismounted moving'downwardly to the position indicated in Figure 10. Akey-lever 41, pivotally connected to the column 46 by a screw 48, isangularly displaced about a pivot 49 to the position indicated in Figure10, a shoulder 58 at the bottom of said column 48 resting against ashelf 5| on the base of the machine. A link 52, connected to the upperarm 53 of the key lever 41 displaces a lever 54 at the rear of themachine leftwardly on a shaft 55 journaled in a boss 58 and a bracket51. A stop-control lever 58, mounted on the opposite end of the shaft55; as indicated in Figure 5, is angularly displaced rearwardly to theposition indicated in Figure 10, the top 59 of the lever 58 rotating thecombination stop 44 about the shaft 40 to the margin-control positionindicated in Figure 10.

To set the selected combination stops in the tabulator-control position,a tabulator-set key 68 is depressed when the carriage reaches thedesired position in its lateral movement, angularly displacing thekey-lever 41 about the pivot 49 to the position indicated in Figure 9,the angular displacement being considerably less than that shown inFigure 10 for margin-control operation. As previously described, theangular displacement of the lever 41 rotates the lever 54, thus rotatingshaft 55 and moving the stop-control lever 58 rearwardly. The top 59 'ofthe stopcontrol lever engages a tip 8| at the bottom of the combinationstop 48, rotating said stop about the shaft 40 into the tabulatingposition indicated in Figure 9. The angular displacement of the.combination stop from its normal position into its tabulating position,Figure 9, is substantially less than that of rotating it into itsmargin-control position, Figure 10. As indicated in Figure 9, theangular travel of the key-lever 41, pivotally attached by the screw 48to the margin-set column 46, is limited by the contact of the extension82 at the baseof the column 48 with the shelf 5| at the base of themachine.

Upon releasing the tabulator or margin stop set key, a spring 63, Figure10, attached to the key-lever 41, returns said lever, and the keys 45and 50 to their normal positions, another spring 15, linking lever 41with the column 45, controlling the angular movement of the margin-setcolumn.

The stop-control shaft 55 is normally mounted in angular relation to theaxis of the platen, as indicated in Figure 5. The outer end of theshaft, loosely journaled in the boss 58 formed in the rear plate 85 ofthe machine frame, is fitted by means of a milled end 61 (Figure 5')into a correspondingly shaped slot 88 at the upper end 84 of shift-frame3| of the machine.

of the lever 54 and riveted at 89 over said lever or fastened by othersuitable means to form a permanent attachment. The opposite end of theshaft 55, substantially at the center of the machine, preferably has twoparallel milled flats 18 6 slidably fitted into a correspondingly shapedslot 1| at the bottom of the stop-control lever 58, in such a mannerthat the lever 58 may retain its vertical position perpendicular to theplaten of the machine regardless of the angular position of the shaft55. Adjoining said stop-control lever, the shaft 55 is journaled in thebracket 51 attached to a plate 65, attached to the rear plate When thecarriage is shifted upward by depressing the usual shift-key 13, Figure4, the bracket 51 displaces the end of shaft 55 through the angle a tothe position indicated by a dotted center line in Figure 5. The shiftedposition of the carriage is illustrated in Figure 8. The rotation of thecombination stops 43 and 44 to the tabulating or margin controlpositions, indicated in Figures 9 and 10 respectively, is accomplishedby the stop-control lever 58 in the manner previously described,regardless of whether the carriage is in its normal or upper-caseposition, as the lever 58 retains its vertical position with its upperend 58 engaging the tips 6! and 14 of the stops regardless of ,theposition of the carriage.

A margin-counter-stop lever 15, Figures-1 and 6, formed with twomargin-counter-stops 11 and 18 which co-operate with the previouslymentioned combination stops to establish the right and left marginsrespectively, may be pivotally and slidably attached, by means of thescrew and 35 higher than constant face 8| of counter-stop 18.-

To start the writing line, the carriage is moved rightward until ashoulder 82 at the bottom of the left combination stop 43 in itsmargin-control position, as previously described, engages the contactface 8| of the right counter-stop 18. As indicated in Figures 6 and 10,clearance is provided at the front of the combination stop 43 to by-passthe left counter-stop 11. The contact ofthe left combination stop 48with the face 8| of the right. counter-stop 18 arrests the rightwardmovement of the carriage and determines the position of the beginning ofthe writing line.

The combination stops 44 on the right half of the rack are undercut asindicated in Figure 10,

to clear the right counter-stop 18 when the carriage is moved leftward.When the writing line is completed, a shoulder 88 of the rightmarginstop 44 engages the contact face 88 of the left counter-stop 11,limiting the leftward movement of the carriage and the writing linelength.

The stops and 44 after being angularly displaced to any of the operativepositions indicated in Figures 9 and 10 are retained in said positionsby a series of letter-spaced spring-detents 84, either individuallyattached or formed by slotting a spring strip mounted onthe rear of therear wall 88 of the stop-rack 38 by any suitable retaininginstrumentalities as shown in Figure 5. The spring-detent84 is formed toengage a notch 81 near the top of the combination stop, retaining thestop in the margincontrol position, Figure 10, or the tabulatorcontrolposition, Figure 9.

With the selected combination stop located in the tabulating position,as previously described, a tabulator-key 88, Figure 1, is depressed whena tabulating position of the writing line is desired, angularlydisplacing the tabulator-key lever 89 about a pivot 90 attached to theframe of the -machine. The angular displacement of the tabulator-keylever 89 rotates a bell-crank 9| about a pivot 92 at the bottom of therear plate 65 of the frame by means of a link 93.

A link 94, attached to the free arm of the bellcrank 9|, rotates a bail95, Figure 1, about 'a pair of pivots 96 on the rear plate 65 of theframe by means of an arm 91, attached to or integral with the lowerarm'98 of the bail 95. The contact face I00 of the tabulator-counterstoplever I 0|, pivotally mounted on the shiftframe by a screw I02, israised into the path of the combination stop by the leftward movement ofthe vertical arm I03 of the bail against an extension I04 at the lowerend of the tabulatorcounter-stop lever IOI.

The leftward motion of the bail 95, through the intermediary of the bailfinger IIO engaging an arm I I I of a bracket II2 pivoted to thecarriageshift frame as by screw H3, and a tie-rod 99, Figure l. linkingbracket II2 with a bell-crank I32, Figure 2, pivotally mounted to theshiftframe as at I32 rotates said bell-crank I32 rightwardly, so that aroll I32 freely mounted on a stud I32 fixed on the free end of bellcrankI32, will shift the carriage-feed rack I09 out of mesh with anescapement pinion I39 by swinging ears I31 outturned at the ends-of saidimpact of the contact of a combination stop 43 or 44 in tabulatingposition with the face I00 of the tabulator counter-stop lever IOI, thespeed of the carriage travel is always kept under suitable control byautomatically braking the pulling action of the spring motor Iproportionately to its power. This'is accomplished by means of areleasable braking pad I06 of leather or other suitable materialco-operating, when the tabulator-key 88 is depressed, with an incline orramp I01 formed under the base-plate I08 of the carriage, as indicatedin Figure 8.

The braking pad I06 is also actuated by th previously described actionof the bail 95 and bracket II2.

As indicated in Figure 3, a spring I I4 and a link H5 connect the freeend of the bracket II 2 to toggle links H6, H1. The lower link II6 ofthe toggle is pivoted on a stud II8 fixed to the rear plate 64 ofshift-frame 3I, while its upper link H1 is pivoted on a pin II9 to thefree endof an arm I20, pivotally mounted on saidshift-frame plate at I2Iand carrying the braking pad I06.

counter-stop lever II" and the frame, withdraws the counter-stop contactface I00 from the path of the combination stops in their tabulatingposition. A spring I23, Figure 3, connecting the lower link II6 of thetoggle to the plate 64, restores the link II6 to its normal position,releasing the brake-pad I06 from engagement with the ramp member I21attached to the usual plate I28 which serves, by co-operating with a barI28 mounted between the carriage-end plates, to prevent a rearwarddisplacement of the carriage during the operation of the machine. All ofthe heads I29 of the previously set stops 43 and 44 are thus broughtwithin the range of a cam I30 mounted substantially at the center of therear of the machine on the plate I28. It is obvious that when thestop-rack 38 is turned to the Figure 11 position,'for stop restoration,it depresses said member I21 to turn the margin counter-stop lever 16,to thereby suppress the margin counter-stops 11, 18 to prevent thelatter from interfering with said stop restoration; said member I21engaging the flange 2I2 of said counter-stop lever 16.

Depressing a carriage-feed rack-control lever I35, Figure 4, pivotallymounted on theplatenshaft I36, angularly displaces a lug I31 attached toone of the carriage-rack ears I31, said lug slidably fitted in a yokeI38 at the bottom of said lever I35, thus raising the carriage-feed rackI09 out of engagement with the escapementpinion I39, the lug I31rotating the rack about pivots I40. Upon releasing the carriage-feedrack, or letter-feeding the carriage normally, the spring motor I 05draws the carriage leftwardly, the heads I29 of the stops being broughtsuccessively into contact with the cam I 30, restoring the stops to aninoperative position, indicated in Figure 4. With the heads. I29 ofthefstops' in contact with the rear vertical wall 86 of the rack, thecombination stops 43 and 44 are out of range of the contact faces SI and80, respectively, of the margin counter-stops, as indicated in Figure 4,with the tips 6! and 14 of the stops outof range of the tabulatorcounter-stop contact face I00. A spring I4I, Figure 4, attached to theupper arm of the lever I35 restores said lever to its normal position,throwing the rack I09 into engagement with the escapement pinion I39when the lever I35 is released, resuming normal letterfeeding of thecarriage.

When lever I24 is released by'the operator, a torsional spring, I3I,Figure 6, carried on the collar 42, one end I33 of said spring beingattached to the carriage-end plate 31 with the opposite end I34 of thespring attached to the lever I24, rotates the lever and the attachedstop rack to their normal positions, indicated in Figthese levers withslidably contacting fingers I24- and I35 as indicated by dotted linesinFigure 4.

In the type-action fragmentarily indicated in Figure 4, depressing acharacter key I42 displaces a key-lever. I43 about a pivot I44 on anextension of the frame. A link I45 connecting the key-lever to abell-crank I46 rotates said bell-crank through a small angle about apivot I41, drawing the typecontrol rack I48, connected to the free endof said bell-crank, forwardly, thereby moving the typehead I50 towardthe platen 35 about a pivot II by means of a gear-sector I52 at the hubend of the type-bar I53, said gear-sector meshing with the teeth I54 ofthe rack I48. A lever I55 pivoted to the upper end of the type-bar I53may be connected to a momentum-accumulator mechanism, asdescribed indetail in Patent No. 1,908,140, issued to G. G. Going, May 9, 1933, tocomplete the movement of the type-carrier in approaching its writingposition at the platen.

ating the carriage-escapement mechanism, is operated by the type-barsI53. A projection I51 at the heel of the type-bar I53 engages the top ofarms I58 rearwardly displace the cross-bar I62 of a bracket I63, thevertical arms I64 of said bracket being pivotally attached at I65 to thebracket-arms I60. The rear face I66 of an escapement-dog-control bracketI61 pivotally attached to a lug I68 of the bracket I63 is displacedrearwardly against a stud I10, Figure 4, moving the escapement-dog I1Irearwardly into engagement with the escapement-wheel I12 to letterfeedthe carriage, by known means utilized on the Underwood Portabletypewriter. The face I66 of bracket I61 may be adjusted relatively tostud I by such means as a set-screw I69.

After the key I42 is released, the projection I51 at the heel of thetype-bar releases the universal bar I56, and a spring I13, attached tothe vertical arm I64 of the bracket I63, angularl'y displaces saidbracket forwardly about the pivot I 65 until the vertical arm reachesthe pin I6I, thus drawing the escapement-dog-control bracket I61forwardly into its normal position, indicated in Figure 4, with thebracket face I66 out of engagement with the stud I10 attached to theescapement-dog I1I, permitting the rear escapement-dog I14 to engage theescapement-wheel I12 and in co-operation with carriage rack I09 and thespring motor I05 to letter-feed the carriage in the usual manner, as thetyping operation proceeds.

Regardless of which one of the right combination stops 44 is selectedfor determining the right-hand margin, it is desirable that the usualsignal be given as the carriage reaches a point the customary distancefrom the end of the writing line.v During the letter-feeding travel ofthe carriage, the tip 14 of the selected right combination stop 44 inthe margin position engages a finger I15, Figure 5, pivotally attachedto a striker-lever I16 in such manner as to permit only a rightwardrotation of finger I15. Lever I18 is pivotally mounted on a screw I11,the opposite end of said lever terminating in a striker I18. When thestop, in its leftward travel, displaces the finger I15, the striker I18is raised from a bell I80 at the right side of the rear of the machine,with which hell it is normally in contact, said striker-lever alsonormally resting against a pin I8I mounted in the bracket I82. As thestop 44 releases the finger I15, a torsional spring I83, connected tothe striker-lever I16 A universal bar I56, Figures 4 and 7, for actu- Ithe frame.

and the bracket I82 at the pivot I11, depresses the striker-lever,swinging the striker against the bell and sounding the line-end signal.

In order that the line-end key-lock and keyrelease may function at theend of a line, regardless of the position of the right combination stop44 adjusted for right margin-control operation, the counter-stop lever16 is preferably arranged to co-operate in key-locking and keyreleasing,when the selected right margin-stop 4 engages the contact face 80 of theleft counterstop. As the carriage continues in its leftward travel, theright combination stop 44 in its margin-control position moves thecounter-stop lever 16 leftward by reason of the previously describedslot and screw mounting of lever 16. A yoke I85, Figure 1, at the leftend of the counter-stop lever engages the upper arm I 86 of a lever I81pivotally mounted on the shift-frame plate 64 by a screw I88. The lowerend of the lever I81 rotates a finger I89 through a small angle about apivot-screw I90 attached to an extension of The angular displacement ofthe finger moves a link I 9I, pivotally connected to the rear of saidfinger by a pin I92, to the left.

The opposite end of the link I9I, Figure 7, connected by pin I93 to auniversal bar locking lever I94, rotates said locking lever about apivot I95, the front end I96 of said lever being pressed under a tongueI91 at the bottom of the universal bar I56 into the position indicatedby dotted lines in Figure 7. The front end I 96 of the lever I 94 inengaging the tongue of the universal bar locks said universal bar in itsupper position, restraining the projection I51 of the type-bar I53 fromdepressing the universal bar I56, thus preventing the type-carriers I50from reaching the platen and thereby blocking the type-keys. 7

When the carriage is again moved to the right, to start a new writingline, the combination stop 44 releases the contact face 80 of the leftcounterstop. A spring I98, Figure 6, attached to a vertical arm 200 ofthe counter-stop lever 16, withdraws said lever rightwardly, the slot19* permitting the lever to slide over the screw 19 to the normalposition indicated in Figures 1 and 5, the yoke I85 releasing the upperend of the lever I81. A spring 20I attached to the rear end of theuniversal bar locking lever I94 willthen rctate said lever aboutthepivot I95 to the position indicated in Figure '7. The front end I96of the lever I94 is thus brought out of engagement with the tongue I91at the bottom of the universal bar I56, allowing the universal bar to bedepressed and permitting the type-carrier I58 to reach the platen when atype-key is depressed.

When it is desired to extend the writing line beyond the establishedright-hand margin, a margin-release button 202, Figure 4, is pressed,and a tie-rod 203, extending from said button and pivotally connected atits rear end 204 to the bottom of a bell-crank 205, rotates saidbellcrank about a pivot screw 206 througha small angle.

The upper arm 201, Figure 5, of the bell-crank 205 rotates the left endof the counter-stop lever 16 about the screw 19 until the upper face 208of the counter-stop lever is arrested by contacting a shoulder 2| 0 atthe top oithe vertical lever I81. The angular displacement of thecounterstop lever 16 is sumcient to withdraw the constop 44 in themargin-control position. The

- writing can thus be continued beyond the cstablished margin position.

Upon releasing the margin-release button 202, Figure 4. a torsionalspring 2, interposed between the upper arm 201 of the bell-crank and theshift-frame of the machine at the screw 208, rotates said bell-crankabout the screw 286, depressing the horizontal arm 281 out of engagementwith the free end of the counter-stop lever 16. The spring I98,connecting the vertical arm 20!! of the counter-stop lever to thebracket I82 mounted on the rear frame, withdraws sa d counter-stop lever15 to its normal position indicated in Figures 1 and 5, with thecounter-stop contact faces 8| and 88 in the respective paths of thecombination stops 43 and 44 located in the margin-control position, thusrestoring the originally established margin positions.

To limit the angular movement of the counterstop lever 16 about thepivot-screw 19, a flange 212, Figure 5. extending from the lower edge ofthe counter-stop lever, may be formed thereon for co-operation with aslot M3 in the plate 55 attached to the shift-frame 3| of the machine.When the counter-stops on the lever 18 are displaced upwardly, the topof the flange 2I2 may, if the angular movement of the lever is carriedfar enough, engage the upper edge of the slot 2l3, thus arresting theupward movement of the counter-stop side of the lever. In the downwardmovement of the counter-stops, the lower edge of the flange 2l2 contactsthe lower edge of the slot 2|3, thus limiting the angular move- Inincorporating a modified form of combination margin and tabulator stop,as indicated in Figures 12 and 14, a stop-rack 220 may be attached tothe carriage-end plates 22l and 22h, by screws 222 or other suitablemeans, in a position similar to that previously indicated with referenceto stop-rack 38.

Two types of combination stops, a right-hand stop 223, shown in detailin Figure 21. and a left-hand stop 224, shown in Figure 22, may beslidably inserted into letter-spaced slots 230, 23l out along theeffective length of the rack, the width of said slots beingsubstantially equal to the width of the stops. The right-hand stops 223are preferably located on the right half of the rack 22!) with theleft-hand stops 224 located on the left half of the rack.

The contour of the left combination stop 224 is substantially the sameas that of the right combination stop 223, with the exception of a slot225 out at the bottom of the right combination stop 223. to by-pass theright counter-stop 226, Figure 20, during the letter-feeding movement ofthe carriage, and the notch 221, out in the rear corner, near the bottomof the left combination stop 224, to clear the left counter-stop 228,during the rightward movement of the carnage.

The rack 220 consists essentially of a rectangular or other suitablyshaped tube. A series of letter-spaced slots 23!! are cut through thetop of the tube with a corresponding set of slots 23l cut through thebottom of the tube in 'line with said upper notches. These notches.extend transversely of the tube, each notch having parallel sides andextending entirely across the widthv of the rack. Suflicient uncut metalis left between the notches to join the sides 232 and 233 firmly topreserve the rigidity of the tube. The top slot 230, the companionbottom slot 23! combination stops 223 and 224, to limit the upward.movement of said stops. Each combination stop may be detained in any ofits operative positions by means of a spring-detent finger 2, formed atthe front of the stop as the result of cutting the longitudinal slot 240close to the front edge of said stop. A pair of projections 242 and 243are preferably formed on one side of the finger 24l to engage theadjacent wall of the slot 230 in the rack, restraining the movement ofthe stop in the rack. The finger 24! is generally bent slightlyleftward, Figures 21 and 22, this inclination, together with the springaction of the finger and the projections 242 and 243, acting as a detentin holding the stop in its various operative positions.

The margin-control position of the combination stops, as 223, shown inFigure 20, is determined by a shoulder 244 formed near the top of therear end of the stop which engages the bottom of the upper notch 230 ofthe rack. The inoperative position of the combination stops, illustratedin Figure 17, is determined by the contact of the bottom 245 of the slot240 in the combination stop with the bottom face 246 of thestop-retainer 238.

In order to set any of the modified combination stops 223 or 224 in themargin-control position, the carriage having previously been moved tothe desired position by the operator, 9. marginstop-set key 241, Figureis depressed, a margin-set lever 248, upon which said key is mount- 254of the lever 248, engage the upper edges of a pair of projecting andvertically extending arms 255 and 255 extending from an adjoiningtabulator-set lever 251. The vertical column 254 of the margin-set lever248 is guided in its longitudinal movement by the co-operation of theside of the tabulator-stop lever 251 and the vertical extensions of arms255'and 256 extending from said tabulator-stop-set lever.

When the tops of the slots 252 and 253 engage the upper edges of theprojections 255 and 256. the tabulator-stop-set lever 251 is angularlydisplaced downwardly about a pivot-pin 260, attached to the side 26f ofthe frame. A tie-bar 282, pivoted at its front end to the lower rear endof the tabulator-set lever 251, by a screw 263, moves a bracket 264,attached to or integral with the rear end of said tie-bar, 'rea'rwardly,rotating a bell-crank 265, one arm of said bellcrank being pivoted tothe bracket 254, by means of a slot 265 in the top of said bracket, saidslot engaging ascrew 2611,, attached to said bell-crank arm. Thebell-crank 265 is rotated clockwise about a pivot-screw 268, attached tothe rear' 212 of a stop-control lever 213, angularly displaces thebottom of said lever leftwardly about stud 214, attached by means of apost 219to the rear plate of the shift-frame. As indicated in Figure 18,a heel 215 of the horizontal arm 216 of the stop-control lever 213engages the top of the lower flange 211 of a stop-control slide 218,depressing said slide. A finger 280, depending from the upper flange 28|of the stop-control slide, engages the top of the selected-combinationstop 223 or 224, depressing said stop until the shoulder 244, Figure 20,rests upon the bot-' tom of the upper notch 230 in the rack. Theselected stops are thus located in the margincontrol positions indicatedat A and B in Figure 14.

To set a selected combination stop for tabulator operation, atabulator-stop-set key 282, Figure 12, is depressed, when the carriagereaches the desired position, angularly displacing thetabulator-stop-set lever 251 about the pivot 260. A horizontalprojecting; arm 283, extending from said lever, engages a slot 284 outin an extension 285 of the frame of the machine, the sides of said slot284 acting as a guide for the arm 283 during the downward movement ofthe lever 251. The angular displacement of the lever 251 by thetabulator-stop-set key is considerably less than that effected bydepressing the margin-stop-set key, it being obvious that the extent ofsaid displacement is determined by the arm 250 striking the front of thekey-lever comb-plate. It will also be obvious that said projecting arm283 of the stop-set lever 251 may co-operate to gage the largerdisplacement of said lever 251 for mar-.

gin-stop setting. As previously described, the heel 215 at the free endof the horizontal arm 216 of the stop-control lever 213 engages the topof the lower flange 211 of the stop-control slide 218, depressing saidslide, the finger 280' at the top of the slide moving the selectedcombination stop 223 to the tabulating position C in- 1 dicated by solidlines in Figure l8. It will thus be apparent that the downward movement'of the stop from its normal position, to its tabulatorcontrol position,is substantially one-half of that previously indicated formargin-control operation, although these positions may be variedconsiderably, depending upon the requirements of the design of, themachine. v

Asindicated in Figure 13, the stop-control slide 218-is guided initslongitudinal movement by a pair of guide-plates 286 and 281, attachedby screws or other suitable means to the rear plate I28 of the frame ofthe machine. The inner edges 288 of the guide-plates are beveled, asindicated in Figure 13, with corresponding bevels on the sides 289 ofthe slide 218, to guide and retain the slide in its longitudinalmovement.

Upon releasing the tabulator-stop-set key, a spring 290, Figure 12,connecting the tie-bar 262 to a pin 29l, inserted in the frame-side 261,withdraws said tie-bar forwardly, raising the tabulator-stop-set lever251 and the tabulator-stop-set key to their normal positions. A normallycontracted extensible spring 292, connecting the top of thetabulator-stop-set lever 251 to the lower arm 250 of the margin-stop-setlever 248, raises said margin-stop-set lever to its normal position onsaid lever 251 when the margin-stop-set key is released. It will beobvious that said marginstop-set lever 248 may simply be hung on saidure 14, by a spring 293, the upper end of which is attached to the fixedstud 214, Figures 12 and 18, with the lower end slidably attached to ashouldered screw or stud 294 inserted near the bottom of the verticalarm 2-95 of the stop-control lever 213. When the bottom of the arm 295of the lever 213 is displaced leftwardly by the movement of the marginor tabulator-stop-set keys, the spring 293 is distorted, in a similardirection as indicated in Figure 18. Upon releasing the stop-set keys,the spring 293 tends to resume its normal vertical position, returningthe lever 213 to its normal position, indicated in Figure 14.

A torsional spring 299 carried around a screw 309 in the horizontal arm216 of the stop-con- 'trol lever 213, and having one end inserted in orotherwise engaging the flange 211 of stopcontrol slide 218, retains theslide in contact with the heel 215 of the stop-control lever. The slide218 is thus brought into its normal position simultaneously with lever213.

In a manner similar to that previously described with reference to thepivoted type of combination stop, a margin-counter-stop lever 296,formed with two margin-counter-staps, a left counter-stop 228 and aright counter-stop 226, may be pivotally and slidably mounted on theouter end of stud 214 by means of a screw 269 and a slot 269, Figure 14.The left counter-' stop 228 is located slightly rearwardly of the rightcounter-stop 226, and the contact faces 298 and 291 of the respectivecounter-stops are of substantially the same height.

To start a writing-line, the carriage is moved rightwardly until aprojection 300, Figure 20, at the bottom of the left combination stop224, in its margin-control position. B, Figure 14, engages the contactface 291 of the right counter-stop 226, arresting the movement of thecarriage and determining the left margin position. As indicated inFigure 20, the notch 221 out in the lower rear corner of the leftcombination stop 224 permits said stop to by-pass the left counter-stop228 during the rightward movement of the carriage. Similarly, asindicated in Figure 21, a slot 225 is vcut at the bottom of the rightcombination stop 223 to clear the right counter-stop 226 when thecarriage is letter-fed.

Upon completion of the writing-line, an extension 30l at the bottom ofthe rear edge of the right combination stop 223 engages the. contactface 298 of the left counter-stop 228, limiting the letter-feed movementof the carriage an determining the writing-line length.

With a selected combination stop, as 223, Figure 14,- in itstabulator-control position, as previously described, a tabulator key302, Figure 12, is depressed, when a tabulating position of a writingline is desired, rotating a tabul'ator-key lever 303, upon which saidtabulator key is mounted, about a pivot-rod 304 extending longitudinallyacross the frame. The lower arm 305 at the rear of the tabulator-keylever, pivotally connected to a tie-bar 306, by a screw 301, moves saidtie-bar, rotating a bail 308, pivotally mounted by a pair of screws'309,inserted in the rear of the frame, counterclockwise of Figure 12, bymeans of an arm 3! extending from the rear end of the tie-bar 306, andpivotally attached to a lowerarm 3 of the bail 308 by a screw 3l2. Afinger M3 on the upper arm of the bail engages a depending arm 3I4 of atabulator-counter-stopcontrol lever 315, Figure '15, drawing said leverrightwardly over apair of screws 346 threaded into the rear plate of theshift-frame, said screws area-rec siidably supporting the lever 3l5 bymeans of a pair of slots 3!! cut in a horizontal arm 3I8 of said lever.When the lever 3I5 is drawn rightwardly, a diagonal slot 320, out in abracket 32I at the free end of the counter-stop lever 3i 5,

near the center of the machine, engages a finger 322, depending from atabulator-counter-stop bracket 323. The tabulator-counter-stop bracket323, pivotally mounted, by means of its bracketside-arms 323, on a pin3225, supported by a bracket 323, attached to the rear of theshiftframe, is angularly displaced upwardly into the operative positionindicated by solid lines in Figure 16 by the camming action of thefinger 322 and the slot 328. The release of the carriagev thetabulator-stop position of the writing line.

When the tabulator-key 362 is released. a spring 339, Figure 15,attached to the bracket 32! of the tabulator-counter-stop lever 3i 5,withdraws said lever leftwardly until the vertical arm 3i 1 dependingfrom the right end of the counterstop lever engages a pin 33l mounted inthe shift-frame. The leftward movement of the diagonal slot 320 againstthe finger 322 causes the counter-stop bracket to move to the positionindicated by dotted lines in Figure 16, with the counter-stop finger 328out of range of any of the combination stops 223 and 223 in thetabulating position. i

The braking action of the carriage, to reduce the jarring impact of thecontact of the combination stops with the tabulator-counter-stoo finger,functions in a manner similar tothat previously described, when thetabulator-key is depressed. The vertical arm '3I4, Figure 12, of thetabulator-counter stop leverin its rightward movement engages the lowerextension arm III at the bottom of the bracket II2, thus actuating thebrake-control mechanism, as previously described.

In order to restore the combination stops 223 and 224 to their normal orinoperative positions, a stop-restorer key 332 at the right side of themachine is depressed, angularly displacing a stop-restorer lever 333upon which said key is mounted rearwardly about a pivot 329 attached tothe right frame side-member. A tie-bar 334 at the bottom of the machineis moved rearwardly by a screw 33!, pivotally connecting the forward endof the tie-bar 334 with the bottom of the stop-restorer lever 333. Asthe lever 333 is displaced rearwardly, the edge of a slot 333 in therear end 331 of the tie-bar 334 engages a screw 333 threaded into an armof a bell-crank 339, rotating said bell-crank about a pivot-screw 340inserted in the bottom of the frame. The freearm 3 of the bell-crank 339connected by a link 342 .to the lower flange 212 of the stopcontrollever 213 angularly displaces said lever rightwardly about the stud 214,raising the horlzontal arm 216 of the lever 213 to ,the positionindicated in Figure 19, with a toe 344 of the stopcontrol lever in theupper or stop-restoring posi:

tion.

When the carriage is letter-fed in the normal previously described. I I

places the finger I leftwardly, the angular manner, or the previouslydescribed rack-control lever 935 is depressed releasing thecarriage-feed rack and allowing the operator to freely move thecarriage, the bottoms of the stops 223 and 224 which had been inoperative position are brought successively into contact with the toe346 of the stop-control lever 213 which, by a camming action, slides thestops upwardly in the rack into the inoperative position D, Figure 19,with the stops out of range of the margin counter-stop contact-faces andthe tabulator-stop contactfinger.

The torsional spring 239, previously mentioned, retains the stop-controlslide against the heel 215 of the stop-control lever when the free endof the arm 21% is raised to any of the upper positions indicated bydotted lines in Figure 18. The finger 280 of the stop-control slide 218is thus thrown idly out of engagement with the top of the combinationstops, when the lever 213 is in its stop-restoring position, asindicated in Figure 19.

The rightward rotation of the vertical arm of the stop-control lever213, actuated by depressing the stop-restorer key 332, draws the link213 rightwardly, displacing the bell-crank 2B5 counterclockwise ofFigure 12. The screw 261 in the free end of the bell-crank 235 is movedforwardly along the slot 266 provided in the upper face of the bracket26% at the rear end of the tie-bar 232, thus preventing the forwardmotion of the screw 251 from being transmitted to the tie-bar, andallowing the stoprestorer key to be depressed without interfering withthe margin or tabulator stop set lever.

The slot 336 is provided at the rear end of the tie-bar 33 A at theright side of the machine for a similar purpose; Depressing themargin-stop-set key 2&1 or the tabulator-stop-set key 282 at theleft-side of the machine displaces the links 219 and 362 and the lowerflange 212 of the stopcontrol lever 213 leftwardly, as previouslydescribed, rotating the bell-crank 339 clockwise. The screw 338 at thefree end of the bell-crank 339 slides forward in the slot 336, thuspreventing the transmission of the motion of the margin and tabulatorcontrol levers to the stop-restorer lever.

When the stop-restorer key 332 is released, a spring 331, one end ofwhich is attached to the rear of the tie-bar 334, the forward end beingconnected by a pin348 to the right side of the machine-frame, withdrawssaid tie-bar forwardly, raising the stop-restorer lever andstop-restorer key to their normal positions.

The line-end-signal device functions in a manner similar to thatpreviously described, the striker I13, bell I30 and finger I15 being thelid same as those utilized with the pivoted type of combination stop.During the letter-feeding movement of the. carriage, the bottom of theselected right combination stop 223, in its marally mounted on the screwI11, the opposite end of said lever terminating in the striker I18, as

When the stop 223 dismovement of the striker-lever I13 raises thestriker I13, in opposition to the spring I83, from the bell "II withwhich it is normally lightly in I30. As the stop releases the finger.I15, the

torsional spring I83, interposed between the striker-lever I16 and thebracket 353 at the pivotscrew I11, brings the striker sharply againstthe bell, as previously described.

The type-action, 'the universal bar and universal bar control mechanism,the line-end keylock, and key-release and the margin-release mechanismsare similar to those previously described with reference to the pivotedtype of combination stops.

The right combination stop 223 in its margincontrol position, aspreviously described, engages the contact face 298, Figure 14, of theleft margin counter-stop 228 a few letter-spaces before the extreme endof the line. As the carriage continues to move leftwardly inletter-space steps, the counter-stop lever 29B is moved leftwardly, thepreviously mentioned screw and slot mounting of lever 296 permittingsuch movement. The leftward movement of the counter-stop lever 296angularly displaces the vertical lever I81 and, through theinstrumentalities previously described, locks the keys through theagency of the universal bar.

When the carriage is displaced rightwardly, to begin anew writing line,the right combination stop 223, in its margin-control position A,disengages contact face 298 of the left margin counter-stop. The springI98 linking the vertical arm 354 of the counter-stop lever to thebracket 353, attached to the rearof the frame, withdraws said leverrightwardly to the normal position indicated in Figures 12 and 14, thepreviously mentioned yoke I85 at the left end of the counterstop leverreleasing the upper end of the vertical lever I81. The universal bar isthus released, as previously described, permitting the normal typebaraction.

It will be understood that the margin-release button 202 and itsassociated-mechanism, previously described in connection with thepivoted type of combination stops may be used in this construction also,as the key action and locking mechanisms are identical in each case. Itwill also be understood that the functions of the combination stops areindependent of whether the typing operation is carried on in upper orlower case position because of the association of the' working partswith the case-shift frame.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim: 1. In a typewritingmachine, the combination with a carriage, and a shaft mounted on saidcarriage, of a plurality of combination margin-and tabulating stopsindividually rotatable on said 'shaft to different operative positions,means, in-

cluding selectively operable keys, for setting said stops individuallyto their operative positions for controlling the tabulator-positions andthe opposite marginal positions of said carriage, counterstopsoperatively engaging said rotatable stops in their oppositemargin-control positions, respectively, for arresting the oppositemarginal movements of said carriage, and a tabulator counterstop.

2. In a typewriting machine, the combination with a springpropelledcarriage and a letterspacing mechanism for said carriage, of a pluralityof stops, mounted on the carriage at letterspace intervals, forcontrolling the opposite marginal and the tabulating positions ofsaid'carriage, each stop being settable individually either to aposition for arresting the carriage marmounted on said carriage, astop-rack pivotally mounted on said shaft, a plurality of adjustablestops pivotally mounted on said shaft, and guided by said rack, saidstops being individually rotatable on said shaft to different settingsfor controlling the margin and tabulating positions of said carriage,and counter-stops operatively engaging said stops in their margin andtabulating positions, respectively, for arresting said carriage in saidmargin and tabulating positions, said rack being rotatable on said shaftfor rotating the stops into position to co-operate with a stop restoringdevice.

4. In a typewriting machine having a laterally slidable carriage, ashaft mounted on said carriage, a stop-rack, a plurality of combinationmargin and tabulator stops spaced laterally from one another by saidrack, and pivotally mounted on said shaft, a mechanism for angularlydisplacing said combination stops about said shaft, into their operativepositions, said stops having detenting connections to said rack foryieldably holding said positions, and counter-stop means operativelyengaging said combination stops for controlling the margin and tabulatorlocations of said carriage.

5. In a typewriting machine having a frame, the combination with alaterally slidable carriage on said frame, of a plurality of combinationstops mounted on said carriage so as to be settable individually todifferent postures for controlling the margin and tabulating positionsof said carriage, counter-stop-means for engaging said combinationstops, including right and left marginal counter-stops laterallyseparated by a gap, and a stop-setter actuatable t'o set said stops anddisposed on said frame to set any individual combination stop when thelatter is registered with said gap by means of said carriage.

6. In a typewriting machine having a letterfeeding and tabulatingcarriage, the combination of a plurality of combination stops mounted onsaid carriage so as to be settable individually to different operativepositions for controlling the margin and tabulating positions of saidcarriage, right and left counter-stops and a tabulating counter-stop forengaging saidcombination stops respectively as margin stops andtabulating stops depending on the setting of said combination stops, amargin-stop-setting key, a tabulatingstop-setting key, a stop-setter,mechanism cooperative with said keys for actuating said stopsetterdifferently for setting any combination stop, from a neutral position,into one or another of its operative positions, the combination stopthat is set depending on the position of the carriage, and means forretaining said stops in their several positions.

7. In a typewriting machine, the combination with a frame and alaterally slidable carriage, of a cylindrical shaft attached to saidcarriage, a plurality of combination stops pivotally mounted on saidshaft, for controlling the margin and tabulating positions of saidcarriage, a stop-rack pivotally mounted on said shaft for laterallyspacing said combination stops, a mechanism angularly displacing saidstops into their operative positions, counter-stops operatively engagingsaid stops for arresting the lateral movements of said carriage at itsmargin and tabulating positions, and instrumentalities mounted on theplurality of combination stops pivotally mounted on said shaft, forcontrolling the lateral movement of said carriage, counter-stop meanstherefor, a mechanism angularly displacing said stops into their marginand tabulator control positions, counter-stops operatively engaging saidstops for arresting the lateral movement of said carriage, aninstrumentality for restoring said combination stops to theirinoperative positions, and means rotating said combination stops aboutsaid shaft into engagement with said restoring instrumentality.

9. In a typewriting machine having a laterally movable carriage, a shaftattached to said carriage, a stop-rack pivotally mounted on said shaft,a, plurality of combination stops pivotally mounted on said shaft to berotatable about the latter to different settings for controlling themargin and tabulating positions of said carriage, and a series ofletter-spaced slots cut in said rack, laterally locating saidcombination stops, said rack being rotatable on said shaft to rotate thestops into position to co-operate with a stop restoring device.

10. In a typewriting machine, the combination with a main frame, a caseshiftable-frame, a platen-carriage supported on said shift-frame, acomplement of stops mounted on said carriage, and selectively settablefor predetermining different margin and tabulating positions of saidcarriage, counter-stop-means for said stops, a setter for said stops,arranged to shift with said shiftframe, a key-mechanism, for saidsetter, on said main frame, and connecting means arranged to enable saidkey-mechanism to actuate said setter whether said shift-frame is in itsnormal or shifted position.

11. In a t'ypewriting machine having a laterally slidable carriage, ahollow rack mounted on said carriage, a series of equally-spaced notchescut transversely through the top of said rack, a corresponding series ofnotches cut transversely through the bottom of said rack in line withsaid upper notches, said notches co-operating to form a series ofvertical slot's through said rack, a plurality of combination stopsindividually slidable in said slots from a neutral position to a marginposition or to a tabulating position, for controlling the margin andtabulating positions of said carriage, counter-stop mechanism having acooperative alignment with the margin positioned combination stops buthaving normally no cooperative alignment with the tabulating-positionedcombination stops, and a tabulating'key operable to bring thetabulating-positioned combination stops and the counter-stop mechanisminto cooperative alignment.

12.v In a typewriting machine having a laterally slidable carriage, arack, a series of letter-spaced slots in said rack, a plurality ofplate-like combination stops slidably fitted and difierently po- Illsitionable in said slots for controlling the margin and tabulatingpositions of said carriage, and counter-stops therefor, each of saidcombination stops having one of its ends jogged to form relativelyoffset margin and tabulating stop lugs engageable with saidcounter-stops.

13. The combination with a laterally reciprocable typing-machinecarriage, of a letterspaced series of combination stops mounted on saidcarriage so as to be settable individually from a neutral position toone or another of different operative positions, to'establish marginstations, or intermediate tabulating stations of the carriage, two,right and left, margin counter-stops for engaging respectively oppositesides of said combination stops in their operative positions, saidcounter-stops being oifset transversely of the carriage path, atabulating counter-stop, and an actuatable stop-setting device,efiective at a plane between said margin counter-stops, whereby, uponinitially placing the carriage at a desired right or left marginstation, or at a desiredintermediate tabulating station, saidstopsetting device is effective, upon actuation thereof, to set theappropriate combination stop to one or another of its said operativepositions to establish such right or left margin station or intermediatetabulating station.

1 4. The invention as defined in claim l3, inclusive of a mechanicalstop-restoring device common to all the combination stops and actuatableat will to effect restoration of any combination stop, fromeither itsmarginal position or from its tabulating position, to a neutralposition.

15. The combination ,with a laterally movable typing-machine carriage, acarriage-movementlimiting stop-device thereon, settable from a neutralposition to an operative position, a counterstop to engage saidstop-device, and restoring mechanism conditionable and effective,through lateral movement of the carriage, to'restore said stop-device toneutral position, of an operative connection between said restoringmechanism and counter-stop effective to disable said counter-stop whilesaid restoring mechanism is conditioned for restoring said stop device.

16. The combination with a typing-machine carriage, and a letterspacedseries of stops therefor, each'stop settable individually from a neu-,tral position to .a marginal position or to a tabulating position, of astop setter engageable with one or another stop, depending on the letterspace position of the carriage, said stop-setter being operabledifferently for setting said stopv to either the marginal pr tabulatingposition, a selectively-operable key-mechanism, including a margin-setkey and a tabulator-set key, for operating said stop-setter differently,and counterstop means for said steps including a counterstop normallyeffective to engage the margin-positioned stops.

17. In a margin-stop mechanism for a typingmachine carriage, a system ofletter-spaced stops individually settable from an idle position to anoperative position, said system being divided into two sub-sets ofstops, one sub-set being for left-hand margins and the other sub-setbeing 7 for right-hand margins, a key-operated device 4 adapted to setthe stops in either sub-set to operativeposition by displacement'ofsubstantiallythe same extent from said idle position, the stops from thestop-lug of any stop set to operative spaced combination stops mountedon said carriage so as to be settable individually from a neutralposition to a position to serve as 2. margin stop or to another positionto serve as a tabulating stop, counter-stop means for said stops andincluding a margin counter-stop normally effective to engage themargin-positioned stops, a stop-setter engageable with any one of saidstops depending on the position of said carriage, said stop-setter beingmovable to different positions to eifect the setting of said stop to itsdifferent positions, a margin-set key, a tabulatorset key, and meanseffective through the operation of one or the other of said setting keysto correspondingly move said stop-setter to one or the other of itsdifferent stop setting positions.

19. In a typewriting machine, the combination with a main frame, a caseshiftable frame there on, and a laterally slidable carriage on said caseshiftable frame, of a plurality of combination stops mounted on saidcarriage and individually movable to different positions, forcontrolling the margin and tabulating positions of said carriage,counter-stops therefor, a slidable stop-setter mounted on said mainframe for controlling the movement of said combination stops, and amember on said case shiftable frame operable for controlling themovement of said stop-setter on'said frame for locating said stops intheir margin and tabulating control positions, said stop-setter beingoperatively connected to said member so as to case-shift with saidmember.

20. In a typewriting machine, the combination with a letter-feedingcarriage, of a rack on said carriage, a system of key-settable stopsmounted on said carriage and disposed at letter-space intervals by saidrack, said system of stops being substantially coextensive with thelength of the carriage run, a stop-setter, a stop-setting keyoperatively connected to said stop-setter to set said stops individuallyto tabulating positions, said system of stops being divided intoright-hand and left-hand .sub-sets, amargin-key operatively connected tosaid stop-setter for setting said stops in said sub-sets from normal tomargin-controlling positions, a counter-stop movable to position toengage the stops that are set to tabulating position, a counter-stop toengage any marginally 'set stop in one sub-set of stops to control theright-hand margin on a work-sheet, and a counter-stop to engage anymarginally set stop in the other sub-set, for controlling the margin atthe left-hand border of the work Sheet. 1

21'. In a typewriting machine having a main frame, a shift-frame, aplaten-carriage supported on said shift-frame, a plurality ofselectively settable combination stops, mounted in letter spaced arrayon said carriage for controlling the margin and tabulating positions ofsaid carriage, counterstops to coact with said combination stops, asetter, for said combination stops, mounted to shift with saidshift-frame, an actuator for said setter mounted on said main frame, andan ophand margin-control positions, the left margin stops being oifset,transversely of the carriage path, from the right margin stops in theset positions of the stops and a pair of counter-stops, one counter-stopbeing individual to the left subset, and the other counter-stop beingindividual to the right sub-set, for limiting the oppositemarginal'movements of said carriage, said counter-stops being oflsettransversely of the carriage path.

23. In a typewriting machine, the combination with a letter-feedingcarriage, of a rack mounted on said carriage, a series of longitudinallyletterspaced slots cut insaid rack, and a system of keysettablecombination stops slidably fitted in the slots in said rack, each stopindividually movable in its slot to different. positions for controllinga marginal or a tabulating position of said carriag'e, counter-stopmeans, including right and left margin counter-stops, for engaging saidcombination stops, and a stop-setter differently operable selectively inrespect to said different positions for setting a stop fora margin orfor tabulating, said carriage being placeable relatively to saidstop-setter for selecting the stop preparatory to setting the latter,said stop-setter working in a plane between said margin counterstops.

24. A key settable margin and tabulating stop mechanism for a typingmachine carriage, including, in combination, n. series of combinationstops mounted at letter-space intervals for individual settings, from anidle position to a margin position or. a tabulating position, amarginset key, a tabulator set key, a single stop-setter, means enablingsaid keys to actuate said stopsetter differently for margin setting ortabulator setting of a stop, and counter-stop means for engaging saidstops for margin or tabulating arrest of the carriage, said counter-stopmeans including a counter-stop normally effective to engage themargin-positioned combination stops.

25. In a margin and tabulating stop-setting mechanism for a typingcarriage, a series of combination margin-and-tabulating stops, meanssupporting said stops at letter-space intervals for individualstop-setting movements, transversely of the carriage, from an idleposition to a margin position or to a tabulating position, saidstop-setting movements being substantially in the same direction but ofdifferent extents from said idle'position, a stop-setter, means,including selectively operable keys, for moving said stop-setterdiiferently to set said stops to said margin or tabulating position, andcounter-stop means for engaging said stops in their set positions, saidcounter-stop means including a counter-stop normally effective to engagethe marginpositioned combination stops.

WILLIAM A. DOBSON.

